Perpetual calendar



Patented lune 20, |899.

No. 627,2I2.

E. SRENSN.

PERPETUAL GALENDAR.

(Application lad June 6, 1898.)

(No Model.)

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NiTn STATES PATENT OFFICE.

ERNEST SORENSON, OF C AMDEN PLACE, AMINNESOTA.

PERPETUAL CALENDAR.

SPECIFICATION forming part of Letters Patent No. 627,212, dated June 20, 1899.

Application [iled June 6, 1898. Serial No. 682,667. LNG model.)

T all whom, t inn/,y concern,.-

Be it known that I, ERNEST SonnNsoN, a subjectof the King of Sweden and Norway, residing at Camden Place, in the county ot' llennepin and State ot' Minnesota, have invented certain new and useful Improvements in Perpetual Calendars; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvementsin perpetual calendars; and the object of my invention is to provide a perpetual calendar adapted to be combined with a penholder or any other cylindrical or nearly cylindrical body.

With this and other objects in view my invention consists of the novel constru ction and arrangement of parts illustrated in the accompanying drawings, in which my calendar is shown as applied to a certain class of penholders.

In said drawings, Figure 1 is a front side View of pen and penholder with myperpetual calendar applied to it. Fig. 2 is a right-hand side view of the upper portion of Fig. 1. Fig.

3 is a central sectional view, as on the line` a o in Fig. 1, `with the pen removed from the holder. Fig. 4 is a front end vien7 of the penholder. Fig. 5 is a side View of the indext-ube contained within the calendar-tube proper. Figs. 6 and 7 are detail views.

Referring to the various parts in the drawings by letters of reference, A designates the pen proper. This may, according to its size, be inserted and iirmly held by either one of the several slits B between the grooved spring-arms C, which are secured at D in the front end of the tube E, which extends from the front end o f the penholder to its bottom F. Opposite the spring-arms O is secured at Gr the spring-latch H, of which the free end I projects forward slightly beyond the penholder. This latch H is provided with a side tooth orcatch J, which projects through an aperture in the tube E and engages with its upper edge either of the notches K in the lower edge of a revoluble ring L, on which the days of the week are indicated, and with its lower edge itengages eitherof the two notches M N in the upper end of the oscillating tube O, which ext-ends from the said ring L down to the line b b, where it meets the front end of the larger outer tube P, which is rigidly secured upon the rear end of the tube E, while the sleeve O and ring L (best shown in the detail views, Figs. 7 and G, respectively,) are loosely litted and retained on the tube E between the fixed ring Q and the front end of the large tube. In Fig. 7, where the numerals are omitted on the tubes, it will be best seen that the abutting ends R of the sleeve i O and the tube P are spiral-shaped, so that they form overlapping corners S and T, on

which the 28th day of February is printed upon the former and the lst day of March upon the latter, and the 29th`ot` February is marked upon the tube E, so that it becomes visible when the tube O is turned with its corner S slightly away from the corner T, and when turned back into its normal; position its corner S covers the number 29 and it remains in this position for three years, and onlyevery fourth or leap year is turned so as to expose the number 29. held in either of said rpositions by the latchtooth J, as already described.

The days in January and -the regular twenty-eight days in February are marked spirally in circular succession about. the tube O, beginning near the week-ring L and terminating at the corners S T, where the days of all the other months of the year commence, and are likewise arranged along the large tube P. The names of the mon ths are printed in abbreviated form upon the tubes near the beginning of each month, preferably dispensing with one or two of the first numerals 'to make room for the initials of the month, as shown in Fig. 2, where Feb. fills the spaces 3 and 4 ought to occupy; but these numbers are dispensed with and are only to be read by knowing that they ought to be there according to the preceding number.

Notable dates, like February 22, July 4, December 25, circ., are indicated by heavy lines around them, which serve as memorandaor reminders of their approach.

The sleeve O is ICO U is the index-tube, adapted to be inserted, as in Figs. land 3, into the large tube P until its open end about meets the bottom F of the tube E, While its closed end remains slightly protruding out of the tube P and is provided with the circular rim V as a fingerhold i'or extracting it from the tube P. This index-tube has at its front end the initials of the days of the week circularly inscribed upon it and its surface laid out by the two transverse lines c and d into three divisions W, X, and Y, of which the first division contains circularly-arran ged numerals representingythe tens and units of the numbers of the the indeX that directly over 96 in the nineyears in the last part of the eighteenth century, While the division X shows like parts of the numbers of each year in the nineteenth century, and the division Y represents in like manner the first forty years ot' the twentieth century.

The dashes e indicate each one that the number preceding it is a leap-year.

In operation the index-tube is pulled out, as in Fig. 5, and, supposing one was to regulate the calendar for the year 1896, he would then look for 96 in the nineteenth century, and, nding that after 96 appears a dash, he will know that it is a leap-year, and he therefore presses on the latch I, turns the tube or sleeve O so that the number 29 in February becomes visible, and then lets the latch lock the sleeve. He further iinds on teenth century stands at the end of the tube the letter W, which indicates -Wednes day as the iirst day in that year,^and he therefore turns the ring L so that W comes directly above the iirst day of January on the sleeve already set. That is all, and the calendar is regulated for that year. The next year, 1897, he skips over the dash e to 97, and, this not being a leap-year, he turns the f sleeve O back so as to cover 29, (and it will so remain for three years,) then sets the ring L so that F, (or Friday,) as indicated above 97 on the index, comes over the first of January on the sleeve. the date ahead two days in the week instead of one day, as in the other years.

It is obvious that thiscalendar may be adapted for pencil-boxes, pill-boxes, matchboxes, and numerous other cylindrical oroval objects and that when applied to a larger article than a penholder the ring L may contain two or more Weeks, and so may each of the circles of dates around the boX, and the circles need not necessarily run spirally; also, that instead of the dashes e any other suitable mark'may be used, so that I do not Wish to confine myself to such immaterial points.

Having thus described my invention, what This will movel revoluble ring having the days of the week upon it and the sleeve having all the days of January and of February in a regular year marked upon it'and the main tube having lall the dates of the last ten months in the year marked in circles upon it, and the small tube or extension on which the sleeve turns having the numeral 29, marked upon it `near by and preceding the first day of March on the main tube, so that by turning the sleeve 29 will be covered by the part of the sleeve on which the 28th of February is marked, substantially as and for the purpose i set forth.

2. A perpetual calendar comprising a main tube with a smaller tube secured in and eX- tending beyond one end of it, a sleeve loosely mounted upon said extension and a loose ring placed still farther out on the eXtension, and means for retaining the ring and sleeve in therrespective places, and a springlatch'secured to the small tube and engaging notches in the ring and the sleeve to lock them at any desired point of rotation, said revoluble ring having the days of the Week upon it and the sleeve having all thedays ofl J anna-ry and of February in a regular year marked spirally upon it and the main tube having all the dates of the last ten months in the year marked spirally upon it, and the small tube or extension on which the sleeve turns having the numeral 29, marked upon it near by and preceding the first day of March on themain tube, so that by turning vthe sleeve 29 will be covered by the part of the sleeve on which the 28th of February is marked; and the index-tube U, adapted to be housed in the main tube and having the days of the week marked around one end and numbers of the years and marks for leapyears arranged upon it in the order shown, substantially as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

ERNEST soRENsoN.

Witnesses:

HAROLD HARRIS, A. M. CARLsnN.

Iol 

